Apparatus for use in manufacturing small metallic pattern-plates.



PATENTED MAR. 6, 1906. P. BONVILLAIN.

ANUFAOTURING SMALL METALLIC PATTERN APPARATUS FOR USE IN M PLATES.APPLICATION FILED MAR.14. 1905.

UNITED STATES PATENT orrron.

PHILIBERT BONVILLAIN, OF PARIS, FRANCE.

APPARATUS FOR USE IN MANUFACTURING SMALL METALLIC PATTERN-PLATES.

To all whom it may concern.-

Be it known that I, PHILIBERT BONVIL- LAIN, a citizen of the Republic ofFrance, and a resident of 6 Rue Blanche, Paris, France, have inventedcertain new and useful Improved Apparatus for Use in Manufacturing SmallMetallic Pattern-Plates, of which the following is a specification, thisbeing a division of my application filed in the United States PatentOfiice July 29, 1904., under the Serial No. 218,626.

This invention relates to apparatus which, combined together, allow therapid manufacture of small metallic pattern-plates as used in multiplemolding of small castings in foundries; but instead of making a duplexpattern-plate containing on one side the top of the multiple patternsand on the other side the bottom parts of same multiple patterns inwhich top and bottom of each pattern. must correspond the new apparatusare so combined that they allow the making of small metallicpattern-plates reversible'i. e., having the tops and bottoms of thepattern of one casting or multiple patterns of the same or differentcasting symmetrically disposed side by side. When ready, three, four, orfive of these small metallic pattern-plates, according to size, areinserted in a special frame or pattern-plates table, which form thusassembled constitutes a complete multiple pattern-plate ready for use,and this multiple pattern has the enormous advantage of being variableat will. 6., when the number of copies of one pattern-plate is over thepattern-plate is taken off from the pattern-plate table and replacedinstantaneously by another one, so

that the molder never makes more molds than required of each pattern,which is not possible with the present solid multiple-pattern-platesystem. It is possible to mold at one time a series of pattern-platesconveniently assembled or juxtaposed but it may'occur that one of thesemay be required to be molded a less number of times than the others. Onemay then be withdrawn to obtain a sufficient number of moldings from it,and it may be replaced by another, whereas if the said pattern-platewere made solid with the others this would be impossible, since therewould then necessarily result the same number of moldings from eachpattern-plate.

In order that the invention may be more clearly understood, apparatusaccording thereto is illustrated, byway of example, in the accompanyingdrawings, in which- Specification of Letters Patent.

, Patented March '6, 1906.

Original application filed July 29, 1904, Serial No. 218,626. Dividedand. this application filed March 14, 1905. Serial No. 250,067-

Figures 1 to 3 are sectional elevations in the direction of line 3 3 ofFig. 4 of the moldboXes employed for casting a molding-plate arranged inaccordance with the successive stages of the operation. Fig. 1 is aperspective view of part of, two superposed frames. Fig. 4 is a planView of the apparatus shown in Fig. 2. Fig. 5 is a plan of a frameadapted to be inserted between the mold-boxes. Fig. 6 is a sectionalelevation of the cast molding-plate in its position on themolding-table, and Fig. 7 a sectional elevation of the molds obtained bymeans of the molding-plate in their connected position ready forcasting.

These apparatus comprise First. Two special frames A and B, closed ontheir four sides, which when superposed form a complete molding-box, asshown in Fig. 1. Side projections or flanges are provided to assemblethem accurately together, either superposed, as in Fig. 1, or placedside by side, as in Figs. 2, 3, and l. It must be noticed that the twosides (marked b b in both frames) are of a particular shape, as shown inFig. 1 and are provided with grooves to form when assembled togetherside by side a semicircular groove h, which forms the cen tral line noof the molding-plate. (See Figs. 2 and 3.) Besides, in the edges Z Zsemicircular openings are cut at two or three points, as shown in Fig. 1in order to allow connections between the central and lateral run ners,but not sufliciently large to allow sand to escape when rammed by handto form a mold.

Second. A special frame (Z with deep side flanges e accurately machined,so as to slide smoothly, but without any lateral play, on the frames Aand B, assembled together side by side, as shown in Figs. 2 and 3. Thisframe at has a central partition f of a special shape having a groove g,provided to obtain on the back of the pattern-plate a rib g, whichinsures the perfect accuracy of its aXis of symmetry when inserted inthe patternplates table.

Third. A special frame 7c, well machined, (so as to be of a perfectlyeven thickness,) which is inserted between the frames A and B, assembledside by side, and the frame (Z and serves to insure a regular eventhickness in all the patternplates, whichare then perfectlyinterchangeable. The frame Tc has its two internal longitudinal sidesgrooved, and on these grooves m m slides a rule a, which TIO serves tolimit the length of patternlates according to size of patterns or num erof patterns included in each of them.

a Fourth. Two cast-iron block-Weights Z Z, well planed on their smallerfiat surfaces, to load. the whole apparatus when casting patternlates.

Fi th. A pattern-plates table 0, which forms a multiple pattern-plate ofwhich the parts are variable at will, pattern-plates bein very easilyinserted in it or taken out to e replaced by other pattern-plates whennecessary in order to make only the strict number of copies required ofeach pattern.

How to make small metal molding-plates: To make a pattern-plate, a firstcopy of the pattern a is made in the ordinary way, by means of framesAand B. (See Fig. 1.) The top part B, being lifted perfectly truly andlevel from the part A, is placed side by side to it, and pattern a istaken off from the part A. Part A has the impression of the bottom andinside portion of pattern a, and B has the impression of the top oroutside portion of same. This being done, the frame dis put on the topof frames A and B, assembled together, as shown in Fig. 2, and a layerof sand is rammed in it to give the exact counterpart of both aboveimpressions. Frame (1 being removed by lifting it with great care, it isnecessary to cut or take off from it part of the sand on all thevertical and inclined walls and to provide ribs wherever necessary toinsure sufficient resistance to the pattern-plate to resist the pressureexerted on it when molding. This being done, the frame 7c is put intoposition, as shown in Figs. 3 and 4, and on the top of it is placed theframe (1 in exactly the same position as before after having limited thelength of the pattern-plate by placing a fiat rule n at the right point,accord ing to size of the pattern a. The sectional view in Fig. 3 showsclearly the free space left for the metal that will form thepatternplate, cylindrical and annular openings, as shown at i and j,being provided to form parts to support the center parts of thepatternplate in the operation of molding and prevent it from bendingunder pressure. Cast-iron blocks Z Z having been put on the top of theframe cl, planed faces downward and arranged to cover exactly theopenings i and j, the metal is poured into the mold thus formed. Thepattern-plate thus obtained has therefore on its upper face two distinctimpressions, one corresponding to the internal or top shape of thepattern a, while symmetrically disposed side by side is the internal orbottom shape of same pattern ai. 0., a

small pattern-plate having on its medial line a half-round projection toform the runner in the mold with runners from the central part to thepatterns and lateral ribs for fixing on the patternplate table. Ontheopposite face the pattern-plate has a shaped rib g, formed by the groove9, which is to engage in a groove of similar shape on thepattern-platetable 0, which determines the exact position of the pattern-plate. Thepattern-plate thus made is ready to be inserted in the patternplatetable 0. To do this, the rib formed by the groove 9 and cylindrical andannular projections formed by the openings 1' and j are placed downward,the rib g fitting exactly in the groove (1 on the central partition ofthe pattern-plate table 0. (See Fig. 6.) Lugs s on a frame 1, placedopposite lugs t of the pattern-plate table 0, bear eccentric bolts 10,which being revolved press bars 1" against the table and the edges ofthe pattern-plate, thus fixing it firmly. This being done, if we taketwo successive impressions of the patternplate thus obtained and if weput the second impression on the first one, left-hand side overright-hand side, we have two complete molds of pattern a. (See Fig. 7.)In this double mold the impressions left by the semicircular projectionsac in each of them are superposed on each other perfectly accurately,forming a cylindrical channel 1 through which metal is poured into themold. (See Fig. 7.)

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is The complete apparatus for manufacturing pattern-platesused in foundries consisting of in combination, two similar frameshaving two faces and their edges machined, a frame adapted to cover theabove-mentioned frames and to fit on their edges and provided in thecenter with a rib at the bottom so as to I

